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Laser-induced, multi-point ignition of premixture in a combustion chamber
Published July 13, 1999 by Society of Automotive Engineers of Japan in Japan
A method for laser-induced, multi-point ignition with a single-shot laser is proposed to improve combustion characteristics and is tested in an optically accessible constant volume chamber filled with premixed methane/air mixtures. The method utilizes both laser-induced spark ignition and recently proposed laser-induced cavity ignition techniques simultaneously. Potential advantage of multi-point ignition over respective laser-induced, single-point ignition is demonstrated. This two- point, laser-induced ignition reduces both flame initiation period and total combustion time significantly. It is found that the center of the chamber is the optimal location for laser focusing in terms of both flame initiation period and total combustion time.